A car moving with a speed of 20 m/s
applies brakes. What is the acceleration
of the car?​

The earth exerts a gravitational force of 500 n on amy. what is amy’s mass in kg?

Two point charges are separated by a certain distance. how does the strength of the electric field produced by the first charge, at the position of the second charge, change if the second charge is doubled? a. the field does not change b. the field strength decreases by half. c. the field strength doubles d. the field strength quadruples

The voltage applied across a given parallel-plate capacitor is doubled. how is the energy stored in the capacitor affected?